On 11 Mar 2012, at 13:00, peter green wrote:
> That in turn triggers a block of code that I added to options.pas which sets
> the default fpu to "fpu_vfpv3_d16" and errors out if the user manually
> specifies a FPU that is not a VFP variant.
Then I suggest you simply debug it like any other code: first set a breakpoint
in options.pas where the fpu type should be set, and verify that it is in fact
set. Then get the addresses of init_settings.fputype and
current_settings.fputype, and set watchpoints on those to see whether they are
still changed somewhere else. Also set a breakpoint in the code generator
somewhere where it should decide whether to use AFP or VFP instructions,
continue and see what goes wrong.
Some other comments about your patch:
* please do not write code like this:
if (target_info.abi <> abi_eabivfp) AND((p.proccalloption in
[pocall_softfloat]) or
(cs_fp_emulation in current_settings.moduleswitches) or
(current_settings.fputype in [fpu_vfpv2,fpu_vfpv3,fpu_vfpv3_d16])) then
Use this instead:
if (target_info.abi <> abi_eabivfp) and
((p.proccalloption in [pocall_softfloat]) or
(cs_fp_emulation in current_settings.moduleswitches) or
(current_settings.fputype in [fpu_vfpv2,fpu_vfpv3,fpu_vfpv3_d16])) then
* is hard float really only supported on ARMv7-A? There are several ARMv6
platforms that also support VFP.
* I'm don't think that requiring yet another different ARM compiler binary for
this is the proper way. There's already enough confusion as it is with ppcarm
variants. I think that there should be no problem to support both vfp-softfloat
and vfp-hardfloat using the same binary, which should get rid of all the
FPC_ARMHF defines. You can always select the appropriate default ABI via the
global configuration file.
* "eabivfp" as a name for the ABI is confusing. The existing VFP support also
uses the eabi. Something like eabihardfp would be better.
Jonas
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